Malicious PDF — malware analysis report

Static analysis result for SHA-256 10802ec6f9ed6f08…

MALICIOUS

PDF

42.9 KB Created: 2020-08-29 20:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f0375aa1de7079b835ec95cb324944a SHA-1: 02b48e6c2ddd8593c64386fd5af377ed69674e57 SHA-256: 10802ec6f9ed6f0846a3d7e87ce67a5b218b45fa20841b8dcda2568cc534fdec
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=christian+de+portzamparc'. It also exhibits characteristics of a link farm, with numerous embedded URLs. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=christian+de+portzamparc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_e92239d1f71f462a970f23ad998aaf7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d40a386dc844cdb4fc434921724c2d.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecf87b87e9d6415997fea48b7193cf8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc6dd03b97a1489d91a051f65fcee5ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73295986d444f3382ac896738b636b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_db0f21ed758f4bd0b9a393ee819e4285.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd5486c1a5304d9491eac897d1ca0c6a.pdf
    • https://static.usrfiles.com/ugd/cc03df_5d6c039b6039499faf7380e0a156b99e.pdf
    • https://static.usrfiles.com/ugd/b8c837_92159ea240ab4638bb195d9e6b6e2f53.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_90f3194e6bc64949924889cee6bf18be.pdf
    • https://static.usrfiles.com/ugd/6cf392_ae14a913c19f45c8a8dac3b664caaf93.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e23a41186604fdda221f1467e8a191e.pdf
    • https://static.usrfiles.com/ugd/b8c837_771c7bb782ae4ffabacd897664d6389f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6336458b2b384417acd3f79f3e1a4aa3.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a47.bin
e9836b253af7f96aec12e709a3637c9abf72c62ae20c7e20ac3176675fa73312
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 5236 bytes
font_01_sfnt_off00007be8.bin
fe51a0fa444ae116c44f6574873ae4a90c15c5f84f32bf9f5f3ce15551880b99
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE8 10388 bytes